import 'package:flutter/material.dart';
import 'package:three_tree/test/interface.dart';

void main() {
  // testLate();
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    StringArray arr = ["1", "2"];
    arr.forEach(print);
    // testLate();
    // test3();
    // var a = "1";
    // // a = 1;
    // dynamic b = "1";
    // b = 1;
    //
    // setState(() {
    //   // This call to setState tells the Flutter framework that something has
    //   // changed in this State, which causes it to rerun the build method below
    //   // so that the display can reflect the updated values. If we changed
    //   // _counter without calling setState(), then the build method would not be
    //   // called again, and so nothing would appear to happen.
    //   _counter++;
    // });
  }

  Future<void> test1() async {
    print("123");
  }

  Future<T> test2<T>(T a) async {
    print("a: ${a}");
    return a;
  }

  test3() {
    test2<String>("1");
    test2("aaa");
  }


  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: SizedBox(
        width: 200,
        height: 200,
        child: Container(
          color: Colors.red,
          width: 200,
          height: 200,
          child: Column(
            children: [
              SizedBox(
                width: 100,
                height: 100,
                child: Container(
                  color: Colors.blueAccent,
                  child: Text("123"),
                ),
              )
            ],
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
